I bought an old Diana at a thrift store...a lot of fun. I stopped taking photos at "12", thought the film's end leader seemed a bit long, and then was surprised by the small negs. (and the extra unexposed film!) As most of my work is large format, the large amount of distortion, etc of the Diana is perfect for me. The negatives from the later toy cameras are almost too good for me!

A scan of a carbon print:
120 Tech Pan, Diana Camera

At least with LF landscape, a bad day of photography can still be a good day of exercise.